Scott Safety’s Protégé ZM single-gas monitor is a zero-maintenance solution, meaning no battery charging and no sensor calibration is necessary to operate the monitor. The monitor’s high-performance battery provides two years of operation and in typical conditions, calibration will not be necessary during the operational lifetime. Three single-gas models are available including oxygen, carbon monoxide, and hydrogen sulfide. The Protégé ZM is small, lightweight, ergonomically designed, and meets IP66/67 requirements for ingress protection. The device also features plenty of customizable settings to meet specific needs, such as a hibernate mode that is available on the CO and H2S models.